JPH0744434U - Guide wire insertion device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a device for easily inserting a guide wire into a blood vessel. [Structure] The Y-tube adapter 1 includes a passage 1a and a branch passage 1
b and the inner diameter of the passage 1a is the guide wire 2
The Y-shaped tube adapter 1 has a cylindrical grip 3 made of a soft synthetic resin and formed on the right end portion 1c thereof.
Is provided with a slanted surface 1d for storing therein, and a lock member 4 for screwing for pressing the soft gripping body 3 stored in the gripping chamber 1e is provided, and the lock member 4 has the same inner diameter as the passage 1a. Has a passage 4a and its left end is a slope 4b.
And has a female taper portion 4c at the right end and a curved needle 6 at the left end 1f of the Y-shaped tube 1 via a packing 5. The needle base 6a is provided so as to be rotatably fitted, and the branch passage 1b is provided.
The terminal 1g is provided with a cylinder 7 and is assembled and configured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention belongs to the technical field of medical devices, and relates to the structure of a device for inserting a guide wire into a blood vessel through a puncture needle.

[0002]

[Prior art]

 In most cases of using a conventional puncture needle to insert a guide wire into a blood vessel, a linear puncture needle is mainly used, and a similar technique is disclosed in Japanese Patent Publication No. 3-5605. There are Kaisho 52-135593, Jitsuhei 4-8918, etc., but if it is difficult to puncture due to the shadow of the patient's organs or bones, change the puncture angle and re-puncture the target blood vessel. Puncture and insert a guide wire into the puncture needle to reach the affected area via the blood vessel. Due to the location of the punctured area, it often happens that the guide wire cannot be smoothly inserted into the target blood vessel and cannot be easily inserted, and care should be taken not to cause unnecessary pain to the patient. Inserting a guide wire into a blood vessel required a considerable degree of skill.

[0003]

[Problems to be solved by the device]

 As mentioned above, due to the puncture site, the guide wire could not be smoothly inserted into the target blood vessel and failed, and the patient was punctured again and again, resulting in unnecessary pain to the patient. Since problems such as giving it often occur, it is a guide wire insertion device equipped with a puncture needle that does not require proficiency even in the above-mentioned difficult-to-puncture site, and it is possible to easily and smoothly guide the guide wire without re-puncturing. A device that can be inserted into the target blood vessel was set as a solution to the problem.

[0004]

[Means for Solving the Problems]

 When inserting the guide wire into the target blood vessel through the puncture needle, change the puncture angle and puncture the target blood vessel at the site where it is difficult to puncture because some tissue organs or bones of the patient are obstructed. However, it requires considerable skill to be able to insert the guidewire with a single puncture. Therefore, in order to puncture easily without requiring a great deal of skill, an anatomy such that the distance from the blood vessel in the shadow of the patient's organ or bone is statistically maintained within a certain interval range, etc. The anatomical knowledge described above is used to accurately and transcutaneously, and the puncture needle is curved so as to puncture the target blood vessel in accordance with the retained distance. A curved puncture needle formed by giving the puncture needle a degree of curvature considering the statistical value of the desired radius of curvature is rotatably provided with respect to the Y-shaped tube adapter, and further extends to the blood vessel. To confirm that blood will flash back when punctured, connect a Y-tube adapter made of a transparent material and a syringe syringe to the branch passage of the Y-tube adapter to induce the blood flashback. And insert the guide wire into the blood vessel. Before the temporary insertion is stopped, the cylindrical soft gripper made of diagonally chamfered sides is deformed by the chasing pressure to block the outside air passage to facilitate the generation of negative pressure in the cylinder. By inducing blood flashback in a short time and making it very easy to confirm that the blood vessel had been punctured, this was taken as a means for solving the problem.

[0005]

[Action]

 By providing the curved puncture needle rotatably to the site where it is difficult to puncture due to some tissue organs, bones, etc. of the patient, the puncture angle can be easily deviated, and the objective Easy to puncture blood vessels. Also, the flashback of blood generated in the Y-tube adapter that comes out of the transparent material when the blood vessel is punctured can be prevented by temporarily stopping the guide wire before inserting the passage of the Y-tube adapter. The outside air to the passage is shut off by the deforming action of the soft gripping body made of a synthetic resin made of a diagonally chamfered side made of synthetic resin by the chasing pressure, and the Y-tube adapter is operated by operating the cylinder syringe cylinder of the branch passage. A negative pressure is created in the passage of the character tube, and the flashback of the blood can be confirmed very quickly. Further, as described above, the inner diameter of the passage of the Y-shaped tube is made larger than the outer diameter of the guide wire, and the cylindrical synthetic resin is formed at the right end portion of the passage of the Y-shaped tube and is obliquely chamfered on both sides. Due to the deformation effect due to the follow-up pressure of tightening and tightening the soft gripping body of the lock member, the guide wire can temporarily stop the insertion in the middle of its insertion and secure a large effective gripping area. There is an effect that local pressure damage injury can be avoided.

[0006]

【Example】

FIG. 1 is a schematic side sectional view of an embodiment of the present invention. The device 1 for inserting a guide wire comprises a Y-tube adapter 1, a curved puncture needle 6 rotatably fitted to the adapter, a syringe cylinder 7 for confirming blood flashback or injecting a drug, a guide A wire 2, a soft gripping body 3 for gripping the guide wire 2, a lock member 4 for pressing the gripping body 3, and a gripping chamber 1e having slopes 1d and 4b for storing the gripping body 3 are provided on the right side of the Y-tube adapter 1. It is provided in the terminal unit, assembled, and configured as shown.

The Y-shaped tube adapter 1 has a passage 1 a and a branch passage 1 b, and the inside diameter of the passage 1 a is formed larger than the outer diameter of the guide wire 2. The right end portion 1c of the Y-shaped tube adapter 1 is provided with a gripping chamber 1e having slanted surfaces 1d and 4b for accommodating a cylindrical gripping body 3 which is made of a soft synthetic resin and is chamfered on both sides. Further, a lock member 4 for pressing the soft gripping body 3 is provided, and the lock member 4 has a screw portion 4e that can be screwed and has a passage 4a having the same inner diameter as the passage 1a. The left end portion thereof has an inclined surface 4b so that the gripping chamber 1e can be shortened by the screw operation, and the right end portion thereof has a female taper portion 4c.

The syringe 7 coupled to the terminal 1g of the branch passage 1b brings the inside of the passage 1a into a negative pressure state by the suction operation and induces a flashback (not shown) of blood from the puncture needle 6.

A needle base 6a having a curved needle 6 is rotatably fitted to the left end 1f of the Y-shaped tube adapter 1 via a packing 5 so that the needle vessel 6 can be pierced in a desired direction. The puncture direction of the puncture needle 6 can be freely changed by changing the angle.

FIGS. 2A and 2B are side sectional views of a portion of the gripping chamber 4 e provided at the right end of the Y-tube adapter 1. The distal end portion 2a of the guide wire 2 is temporarily inserted in the middle of the passage 1a, and the locking member 4 is further tightened and rotated to compress the gripping chamber 1e, thereby compressing the gripping chamber 1e. The cylindrical gripping body 3 with both side oblique chamfers is a soft gripping body due to the gripping chamber structure (figure a) in which the both side oblique chamfers 1d and 4b of the gripping chamber 1e are provided and the lock member 4 is further tightened and compressed. 3 does not extend to both the gap between the passage 1a and the guide wire 2 of the passage 4a (Fig. B) and hold the surface of the guide wire 2 at that portion uniformly long to hold the guide wire 2 softly and firmly. The function of a check valve is provided by shutting off the outside air from the exhaust passage 4a.

[0011]

[Effect of device]

 As described above, according to the structure of the present invention, since the needle base 6a of the curved puncture needle 6 coupled to the left end of the Y-shaped tube adapter 1 is rotatably fitted, the direction of puncturing the target blood vessel Alternatively, the direction at hand can be freely deflected. Further, the structure of the gripping chamber 1e provided at the right end of the Y-tube adapter 1 and the structure of the slanting chamfers 1d and 4b of the gripping chamber 1e, both side chamfering structures of the soft gripping body 4 and the additional tightening of the lock member 4 are performed. Due to the rotational compression, the soft gripping body 4 escapes and extends into both the gaps between the side passages 1a and the guide wire 2 in the passage 4a, and grips the surface of the guide wire 2 at that portion uniformly for a long time. Has a function of a check valve by grasping the flexible and firm air and blocking the outside air from the passage 4a. Further, the suction operation of the cylinder 7 connected to the terminal 1g of the branch passage 1b causes a negative pressure in the passage 1a to induce a flashback (not shown) of blood from the puncture needle 6. And so on.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view of an embodiment of the present invention.

2A and 2B are side cross-sectional views in which a gripping chamber 1e portion is enlarged.

[Description of Symbols] 1 guide wire insertion device 1 Y-tube adapter 1a passage 1b branch passage 1c right end 1d slope 1e gripping chamber 1f left end 1g end 2 guide wire 2a tip 3 both sides with a chamfered tubular shape Soft synthetic resin grip 4 Lock member 4a Passage 4b Slope 4c Female taper 4d Tip 4e Screw 5 Packing 6 Curved puncture needle 6a Needle base 7 Cylinder

[Procedure amendment]

[Submission date] March 17, 1995

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location A61M 25/00 450 B

Claims (1)

[Scope of utility model registration request] 1. A device for inserting a guide wire into a blood vessel, wherein a Y-tube adapter 1 includes a passage 1a and a branch passage 1.
b and the inner diameter of the passage 1a is the guide wire 2
Is formed to be larger than the outer diameter of the Y-shaped pipe adapter 1, and the right end portion 1c of the Y-shaped pipe adapter 1 has a slanted surface 1d for storing a cylindrical gripping body 3 made of soft synthetic resin and having both side slant chamfers,
A gripping chamber 1e having 4b is formed and a lock member 4 for pressurizing the soft gripping body 3 is screwed and provided.
The lock member 4 has a passage 4a having the same inner diameter as that of the passage 1a, the left end of the lock member 4 has an inclined surface 4b, and the grasping chamber 1e is shortened, and the right end thereof has a female taper portion 4c. A needle base 6a having a curved needle 6 via a packing 5 at the left end 1f of the Y-shaped tube 1.
A device for inserting a guide wire, characterized by being rotatably fitted and provided with a cylinder 7 at a terminal 1g of the branch passage 1b and assembling them.